Improvement in oscillating chairs



UNITED STATES PATENT OF ICE.

HENRY HOWSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'ro HENRY s. HALE,TEMAs KILBURN, J. WARREN HALE, oHENEY KILBURN, AND

WARREN HALE, OF SAME PLACE.

IMPROVEMENT IN OSCILLATING CHAIRS.

Specification forming part of Letters Patent No. 173,636, dated February15, 1876; application filed December 6, 1875.

' To all whom it may concern:

Be it known that I, HENRY HowsoN, of Philadelphia, Pennsylvania, haveinvented an Improvement in Spring-Supported Chairs, of which thefollowing is a specification:

Myinvention relates to an improvement in chairs, the seats of which aresupported by springs; and the object of my invention. is to so constructa chair of this class that the seat can be turned laterally to anydesired position, and can be adjusted vertically.

This object I attain in the manner which I will now proceed to describe,reference being had to the aceompanyingdrawing,'in which Figure lis aside view, and Fig. 2 a front view, of my improved chair, of which Figs.3

and 4 represent modifications of the invention..

The base A of the chair may consist of a simple circular disk of wood ormetal, as shown, or may be made with four short legs, in the usualmanner, and to this base is firmly secured the screw-spindle B, thethread of which is adapted to an internal thread in the bar D, thelatter being connected by two pairs of springs, G and G, to the seat H.

composed of one bar of steel, bent'to the form shown, the upper straightportions of the bar being secured to the seat H, and the endsbeingattached, by any suitable means, to the bar D.

In Fig. l the springs are bent inward and downward from the seat; butthey may be constructed and arranged in many dili'erent ways. Forinstance, the springs may be as shown in Fig. 3, or may be bowedoutward, as indicated by dotted lines, the ends being secured toprojections 00 on the bar D.

In order to limit the rocking movement of the seat, I secure-to the hubb of the bar, through which the screw-spindle passes, rods (1, connectedtogether and strengthened by a third rod, 0, the frame thus constructedservin g to arrest the seat both during its forward and backward tiltingmovement. In some cases I may secure arms d, Fig. 4, to the .under sideof the seat, one arm arresting the forward tilting movement by coming incon-' tact with the bar D, the other arm, in like manner, limiting therearward tilting of the seats It will be evident that a chair thus con-.

strueted possesses all the advantages of other chairs with spring-supported seats; at the same time the seat can be turned laterally toany desired position, and adjusted vertically on the screw-spindle.

I claim as my invention-'- 1. The combination, in a chair, of a base, A,and screw-spindle B, secured to the same, the bar I) adapted to the saidscrew-spindle, and

springs GG, serving as mediums for connecting'the bar to the seat H, allsubstantially as set forth. As shown in Fig. 1, each pair of springs isq HENR HOWSON.

Witnesses:

HARRY HoWsoN, J a,

HARRY SMrrH.

